11091988481 has 8 divisors (see below), whose sum is σ = 12678652800. Its totient is φ = 9505847808.

The previous prime is 11091988471. The next prime is 11091988483. The reversal of 11091988481 is 18488919011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11091988481 - 2²² = 11087794177 is a prime.

It is a super-2 number, since 2×11091988481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11091988483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84416 + ... + 171201.

It is an arithmetic number, because the mean of its divisors is an integer number (1584831600).

Almost surely, 2^11091988481 is an apocalyptic number.

It is an amenable number.

11091988481 is a deficient number, since it is larger than the sum of its proper divisors (1586664319).

11091988481 is an equidigital number, since it uses as much as digits as its factorization.

11091988481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261823.

The product of its (nonzero) digits is 165888, while the sum is 50.

The spelling of 11091988481 in words is "eleven billion, ninety-one million, nine hundred eighty-eight thousand, four hundred eighty-one".